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Matter composition and formation conditions of the Pliocene-Pleistocene sediments in the Kuril basin (sea of Okhotsk)

  • Marine Geology
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Oceanology Aims and scope

Abstract

An integrated (petrographical and micropaleontological) study of the sedimentary cover samples dredged from the lower slopes of the Kuril deep-sea basin was carried out. The Pliocene-Pleistocene sediments are mainly represented by tuffaceous sedimentary rocks (tuffites, tuffaceous muds, tuffaceous diatomites, tuffaceous silts, tuffaceous sandstones, etc.). Significant admixtures of pyroclastic matter, especially of volcanic glasses, indicates that the sedimentation process was accompanied by explosive volcanism. The data obtained give evidence about the intensification of the tectonomagmatic regime within the region under study during the Pliocene-Pleistocene time. By the beginning of the Pliocene, a deep-sea basin with a well-manifested continental and/or island slope and a narrow shelf already existed. The Pliocene-Pleistocene deposits accumulated in a cold well-aerated deep-sea basin under oxic conditions and downslope sediment transport.

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Authors and Affiliations

  1. Il’ichev Pacific Oceanological Institute, Far Eastern Division, Russian Academy of Sciences, Vladivostok, Russia

    N. G. Vaschenkova, E. P. Terekhov & I. B. Tsoy

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  1. N. G. Vaschenkova
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  2. E. P. Terekhov
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  3. I. B. Tsoy
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Original Russian Text © N.G. Vaschenkova, E.P. Terekhov, I.B. Tsoy, 2006, published in Okeanologiya, 2006, Vol. 46, No. 5, pp. 735–744.

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Vaschenkova, N.G., Terekhov, E.P. & Tsoy, I.B. Matter composition and formation conditions of the Pliocene-Pleistocene sediments in the Kuril basin (sea of Okhotsk). Oceanology 46, 692–701 (2006). https://doi.org/10.1134/S0001437006050092

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  • DOI: https://doi.org/10.1134/S0001437006050092

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